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<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>143.CSS渐变投影</title>
  <link href="./style.css" rel="stylesheet">
</head>
<body>
  <div class="box"><h2>Gradient</h2></div>
  <div class="box"><h2>Box</h2></div>
  <div class="box"><h2>Shadow</h2></div>
</body>
</html>